/Engine/Source/Runtime/CoreUObject/Public/Internationalization/PackageLocalizationCache.h
Try and find an existing cache for the given culture name, and create an entry for one if no such cache currently exists.
A pointer to the cache for the given culture.
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FPackageLocalizationCultureCache](API\Runtime\CoreUObject\Internationalization\FPackageLocalizationCultureCache) > FindOrAddCacheForCulture_NoLock ( const [FString](API\Runtime\Core\Containers\FString) & InCultureName )